The phrase "about the first topic" is correct and usable in written English.
It can be used when referring to a specific subject or theme that has been previously mentioned or is being discussed.
Example: "In this section, we will delve deeper about the first topic and explore its implications."
Alternatives: "regarding the first topic" or "concerning the first topic".
About the first topic Ebershoff is decidedly gloomy, offering this description of the Poore mansion's maids: "The girls, feather dusters in their fists, would cluck and sigh, for they too had witnessed this common tragedy, over and over: their mothers, their sisters, each wrongly betrothed, each mending fissures in their souls".
He said France and Europe could not ignore "important migratory movements" but that before worrying about immigration, "the first topic is how to help these revolutions," Mr. Fillon said.
But still, the first topic everyone wants to pry about is the boyfriend she dated more than 30 years ago.
Because the first five topic areas took up more than 15 minutes each, the candidates only had three minutes to talk about the sixth topic, cures for partisan gridlock in Washington.
On a recent Friday, the assignment was "revisiting bliss," bliss having been the first topic the group wrote about.
The first topic covered is advertising.
A review of TBCs' technological capabilities will be presented first, which will allow the introduction of the second topic about relationship networks.
The second topic about human dentition dealt with some practical aspects of the anatomy of a tooth (e.g. enamel is insensitive while dentine and cementum are sensitive), the number of deciduous and permanent teeth and the approximate age of eruption of permanent molars.
The third topic that students and families talk about is the cost of a college education.
The fifth topic informed students about various betel nut and tobacco containing products available in the society as well as the health consequences of using these products.
